Central locking device

Abstract

A system for the central locking of several closure points of an automotive vehicle with a remotely controlled setting member at each closure point has a central control circuit, as well as activating switches. Each switch has a neutral central position between "closed" and "open" positions at one or more closure points, by which the control circuit can be controlled for movement of all setting members in the same direction. A switch sequence of the invention provides for individual opening of a closure point by a process wherein the actuating switch must be brought into the "closed" position and then immediately into the "open" position.

We claim: 
     
       1. A device for centrally locking several closure points in an automotive vehicle, each remote closure point having a setting member for control of the closure point, the device comprising a central control circuit, and a plurality of actuating switches, individual ones of said switches at one or more of the closure points having a neutral central position between "closed" and "open" positions by which the control circuit can be controlled for movement of all of said setting members in a common direction; and   wherein said control circuit provides switch sequences wherein a) if one of the actuating switches is brought into a "closed" position, all setting members move into a closed position insofar as they are not already in the closed position;   b) if one of the actuating switches is brought into an "open" position, then all setting members are brought into an open position; and   c) if one of the actuating switches is brought into the "closed" position and then immediately thereafter into the "open" position, then only the corresponding setting member is moved into the open position.     
     
     
       2. A locking device according to claim 1, wherein the switch sequence c) takes place only if a period of time between the "closed" and "open" position is less than a predetermined time period.   
     
     
       3. A locking device according to claim 2, wherein said predetermined time period is 400 to 600 milliseconds.